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Perceptual grouping ability in Williams syndrome: evidence for deviant patterns of performance

Farran, Emily K. (2005) Perceptual grouping ability in Williams syndrome: evidence for deviant patterns of performance NEUROPSYCHOLOGIA, 43 (5). pp. 815-822.

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Williams syndrome (WS) is a rare genetic disorder. At a cognitive level, this population display poor visuo-spatial cognition when compared to verbal ability. Within the visuo-spatial domain, it is now accepted that individuals with WS are able to perceive both local and global aspects of an image, albeit at a low level. The present study examines the manner in which local elements are grouped into a global whole in WS. Fifteen individuals with WS and 15 typically developing controls, matched for non-verbal ability, were presented with a matrix of local elements and asked whether these elements were perceptually grouped horizontally or vertically. The WS group was at the same level as the control group when grouping by luminance, closure, and alignment. However, their ability to group by shape, orientation and proximity was significantly poorer than controls. This unusual profile of grouping abilities in WS suggests that these individuals do not form a global percept in a typical manner.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Psychology
Authors :
Farran, Emily
Date : 1 January 2005
Funders : Reading Endowment Trust Fund
DOI : 10.1016/j.neuropsychologia.2004.09.001
Copyright Disclaimer : Copyright © 2004 Published by Elsevier Ltd.
Depositing User : Diane Maxfield
Date Deposited : 01 Jul 2019 10:17
Last Modified : 01 Jul 2019 10:17

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